( 2002) experimentally investigated the relationship between the geometries of receiver holes and flow energy loss in a direct-transfer pre-swirl system. By measuring the flow field and temperature distribution in the receiver hole, it was confirmed that the temperature drop of the cooling air was increased as the swirl ratio was increased. ( 1997) conducted both experimental and numerical study on a direct-transfer pre-swirl system in which the pre-swirl nozzles and the receiver holes were mounted at the same radial location. Hence, a well-designed pre-swirl system can help reducing the amount of cooling flow, and ultimately, can improve turbine performance.Įfficiency of the pre-swirl system is analyzed by temperature drop and mass flow rate. In addition, because of the relatively high circumferential velocity of the cooling air, the relative total temperature at the rotating parts is decreased. By inducing a flow angle in advance, the pressure loss can be minimized to maintain both pressure and mass flow rate as high as possible in the rotating cooling path. In this case, a pre-swirl system is installed for reducing energy loss of the cooling air moving from the stationary to rotating parts. To this end, within the operating conditions specified to meet the target performance, the secondary air system should be designed primarily for supplying cooling air with appropriate pressure, temperature, and mass flow rate to each row of the turbine blades. For such a system to operate reliably, it is necessary to improve the secondary cooling flow path design for efficient cooling of the turbine components. Currently commercial H class industrial gas turbines have a TIT up to 1650☌. The recent trend in modern gas turbine operation involves increasing compressor pressure ratio and TIT (Turbine Inlet Temperature) to improve turbine efficiency and the generated power. The performance was also analyzed for pressure ratio and off-design points, with the optimized model showing better performance at all boundary conditions. The optimized model improved the span-wise uniformity of the flow path and the discharge coefficient was increased by 2.57%, whilst the adiabatic effectiveness remained nearly constant. The Kriging model was constructed as the surrogate one, and refined iteratively until satisfying the convergence criteria between the estimated point and the CFD result. The OLHD method was used to obtain the initial scattered test points, and the additional ones were supplied by the ALHD method. After sensitivity analysis, seven design variables were chosen on the three planes of nozzle span-wise direction. The system performance was analyzed by 3D CFD and the objective functions were used to maximize the discharge coefficient and the adiabatic effectiveness. In this study, a vane type pre-swirl nozzle was optimized to increase mass flow rate and temperature drop for given boundary conditions. Although various optimization studies were conducted to increase the pre-swirl efficiency, most of the studies were focused on a hole type pre-swirl nozzles. Plus, guests can enjoy these $7 Manarita Sips To Go at participating locations.Pre-swirl system is installed to minimize energy loss between the stationary and rotating parts of turbine secondary air system. “We like to keep our guests in good spirits by sending them island vibes and tropical flavors in top-shelf margaritas for an unbeatable price.”Īpplebee’s Mucho Cocktails are made with ultra-premium spirits and served in a signature Mucho glass. “We’re proud to introduce our new $7 Mana Margaritas made with Teremana tequila, which is the fastest-growing, ultra-premium spirit in the country,” says Patrick Kirk, vice president of beverage innovation at Applebee’s. Both Manaritas feature Dwayne Johnson’s ultra-premium Teremana Blanco Tequila. Or be adventurous and ride the new Cyclone Swirl Manarita, a frozen margarita mixed with sweet strawberry and mango. Made with Dwayne Johnson’s ultra-premium Teremana small batch tequila, the new $7 Mucho Manarita Sips will keep your summer groove going.ĭream of sandy beaches with the new Blue Tiki Manarita mixed with a juicy blend of passion fruit, pineapple, cherry, and lime. Applebee’s, one of America’s most sought out destinations for celebrations with friends and family, is channeling the Mana with the debut of two new margaritas.
0 kommentar(er)
